Microsoft and Resecurity disrupted Fox Tempest, a malware-signing service that used fake Microsoft certificates to make malware look legitimate. Resecurity supported Microsoft’s Digital Crimes Unit (DCU) in its disruption of Fox Tempest, a financially motivated threat actor operating a malware-signing-as-a-service (MSaaS) capability used by cybercriminals to make malicious files appear legitimate. On May 19, 2026,…
Tag: Tempest
AI, Apps, Endpoint, Exploits, Global Security News, malware, Risk Management
The Underground Malware-Signing-as-a-Service That Makes Ransomware Look “Verified” on Windows
The Core Technical Concept: Code Signing At the center of Microsoft’s disruption of the Fox Tempest cybercrime operation is a foundational trust mechanism that modern operating systems rely on heavily: code signing. Code signing is a cryptographic trust framework used by operating systems such as Windows to verify both the integrity and origin of executable…
AI, china, Global Security News, Government & Policy, malware, Network Security
Microsoft dismantled malware-signing network Fox Tempest
Microsoft disrupted Fox Tempest, a malware-signing-as-a-service (MSaaS) that allowed attackers to sign malware with fake trusted certificates. Microsoft said it disrupted a cybercrime operation run by a threat actor named Fox Tempest, which helped threat actors sign malware with short-lived certificates to make malicious software appear legitimate. The service abused Microsoft Artifact Signing and supported…
Global Security News
Microsoft Takes Down Fox Tempest for Providing Ransomware-Enabling Signing Tool
Microsoft’s Digital Crimes Unit has taken down the infrastructure of Fox Tempest, a prolific cybercrime-enabling threat group
Global Security News, malware
Termite ransomware breaches linked to ClickFix CastleRAT attacks
Ransomware threat actors tracked as Velvet Tempest are using the ClickFix technique and legitimate Windows utilities to deploy the DonutLoader malware and the CastleRAT backdoor. […]